NLC 2009-06-18/19
BAA report
The report to the BAA Aurora Section gives an overview of the night, which times were cloudy, free of NLC, or with sightings of NLC.
Name of observer: Horst Meyerdierks
Location: Royal Observatory Edinburgh, 55.9N 3.2W
unattended dSLR with limited field of view A ~325-35, h ~0-40
images every 5 min
Date: 2009-06-18/19
UT forms bright height azimuth comments
ness top bot left rght e.g. weather
----- ----- ------ ------- ---- ---- --------------------------------
21:40 X cloud to h 5
21:45 X cloud to h 5
21:50 X no image
21:55 X no image
22:00 X cloud
22:05 X cloud
22:10 NLC 1 25 15 340 >350 cloud to h 5 and on right
22:15 II 2 25 15 330 360 cloud to h 5
22:20 II 2 30 15 325 360 cloud to h 5
22:25 II 2 30 15 325 360 cloud to h 5, to h 15 on left
22:30 II 2 30 15 325 360 cloud to h 10, patches to h 15
22:35 II 2 30 15 325 360 cloud to h 15
22:40 II 2 40 <325 360 cloud to h 15
22:45 II 2 patchy cloud
22:50 II 2 patchy cloud
22:55 II 2 patchy cloud
23:00 II 2 patchy cloud
23:05 II 2 30 5 <325 5 cloud to h 5, patches higher
23:10 I,II 2 30 5 <325 15 cloud to h 10
23:15 II 2 20 5 <325 20 cloud to h 5
23:20 II,III 2 20 5 <325 20 cloud to h 5
23:25 II,III 2 20 5 <325 20 cloud to h 5
23:30 II,III 3 20 <5 <325 25 cloud to h 5
23:35 II,III 2 15 <5 <325 25 cloud to h 5
23:40 II,III 3 15 <5 <325 30 cloud to h 5
23:45 II,III 3 15 <5 <325 30 cloud to h 5
23:50 II 4 10 <5 <325 30 cloud to h 5
23:55 II 4 10 <5 <325 30 cloud to h 5
00:00 IV 4 cloud to h 5
00:05 IV patchy cloud to h 15
00:10 IV 4 patchy cloud to h 15
00:15 IV 4 10 <325 >30 patchy cloud to h 10
00:20 IV 4 10 <325 >30 patchy cloud to h 10
00:25 IV 4 10 <325 >30 patchy cloud to h 10
00:30 II,IV 4 15 <325 >30 patchy cloud to h 10
00:35 II,IV 4 15 <325 >30 patchy cloud to h 10
00:40 II,IV 4 15 <325 >35 patchy cloud to h 10
00:45 II,IV 4 15 <325 >35 patchy cloud to h 10
00:50 II,IV 4 15 <325 >35 patchy cloud to h 10
00:55 II,IV 4 15 <325 >35 patchy cloud to h 15
01:00 NLC 4 patchy cloud
01:05 NLC patchy cloud
01:10 NLC patchy cloud
01:15 NLC 4 patchy cloud
01:20 NLC patchy cloud
01:25 NLC patchy cloud
01:30 NLC patchy cloud
01:35 NLC patchy cloud
01:40 NLC patchy cloud
01:45 NLC patchy cloud
01:50 X cloud
01:55 X cloud
02:00 X cloud
02:05 NLC? patchy cloud
02:10 X cloud
02:15 X cloud
02:20 X cloud
02:25 X cloud
02:30 X cloud
02:35 X cloud
02:40 X cloud
02:45 X cloud
02:50 X cloud
forms: I: veil
II: bands
III: waves
IV: whirls
NLC: other than or multiple of I-IV
0: no NLC
X: no decision possible (mist, cloud etc.)
brightness: 1: very weak
2: clearly detected
3: clearly visible
4: very bright
5: extremely bright
NLCnet report
The periods of positive sightings of NLC are reported to the NLC Observers' Home Page:
Name: Horst Meyerdierks
Country: Scotland
Location: Edinburgh
Date: 2009/06/18-19
Start: 22:10
End: 01:45
Forms: I, II, III, IV
Max elevation: 40
Max brightness: 4
Comments:
<a href="http://www.chiandh.me.uk/p/NLC_2009-06-18/19>Images</a>.
forms: I: veil
II: bands
III: waves
IV: whirls
O: other than or multiple of I-IV
brightness: 1: very weak
2: clearly detected
3: clearly visible
4: very bright
5: extremely bright
Images
Listed below are the images with positive sightings of NLC. These have been processed merely to adjust the brightness for underexposure. For some, there may also be an unsharp-masked version of the image.
UT exp A hSun h15 h85 stretch image (masked) ----- ------ ----- ----- ----- ----- ----- --------------------- 22:10 0.400 331.6 -6.4 1.5 166.2 0-255 q2719.jpg m2719.jpg 22:15 0.600 332.7 -6.7 1.0 164.0 0-255 q2720.jpg m2720.jpg 22:20 0.800 333.8 -7.0 0.6 161.3 0-255 q2721.jpg m2721.jpg 22:25 1.000 334.9 -7.3 0.3 158.0 0-255 q2722.jpg 22:30 1.300 336.1 -7.6 0.0 153.8 0-255 q2723.jpg 22:35 1.300 337.2 -7.9 -0.3 148.3 0-200 q2724.jpg 22:40 2.000 338.3 -8.2 -0.5 140.9 0-200 q2725.jpg 22:45 2.500 339.4 -8.4 -0.7 131.1 0-255 q2726.jpg 22:50 2.500 340.6 -8.7 -0.9 118.1 0-255 q2727.jpg 22:55 3.200 341.7 -8.9 -1.1 102.1 0-255 q2728.jpg 23:00 4.000 342.8 -9.1 -1.3 85.2 0-255 q2730.jpg 23:05 5.000 344.0 -9.3 -1.4 70.0 0-255 q2732.jpg 23:10 6.000 345.1 -9.5 -1.6 57.9 0-255 q2735.jpg m2735.jpg 23:15 6.000 346.3 -9.7 -1.7 48.9 0-255 q2738.jpg 23:20 8.000 347.4 -9.8 -1.8 42.3 0-255 q2741.jpg 23:25 8.000 348.6 -10.0 -1.9 37.4 0-255 q2744.jpg 23:30 8.000 349.8 -10.1 -2.0 33.7 0-255 q2748.jpg 23:35 8.000 350.9 -10.2 -2.1 30.9 0-255 q2752.jpg 23:40 8.000 352.1 -10.3 -2.1 28.7 0-255 q2756.jpg 23:45 8.000 353.2 -10.4 -2.2 27.1 0-255 q2760.jpg 23:50 4.000 354.4 -10.5 -2.2 25.8 0-200 q2765.jpg 23:55 4.000 355.6 -10.6 -2.3 24.8 0-200 q2769.jpg 00:00 8.000 356.7 -10.6 -2.3 24.1 0-255 q2772.jpg 00:05 8.000 357.9 -10.6 -2.3 23.6 0-255 q2776.jpg 00:10 4.000 359.1 -10.7 -2.3 23.4 0-255 q2781.jpg 00:15 4.000 0.2 -10.7 -2.4 23.3 0-255 q2785.jpg 00:20 4.000 1.4 -10.6 -2.3 23.5 0-255 q2789.jpg 00:25 4.000 2.6 -10.6 -2.3 23.8 0-255 q2793.jpg 00:30 4.000 3.7 -10.6 -2.3 24.4 0-255 q2797.jpg 00:35 4.000 4.9 -10.5 -2.3 25.2 0-255 q2801.jpg 00:40 4.000 6.1 -10.5 -2.2 26.2 0-255 q2805.jpg 00:45 4.000 7.2 -10.4 -2.2 27.7 0-255 q2809.jpg 00:50 4.000 8.4 -10.3 -2.1 29.6 0-255 q2813.jpg 00:55 4.000 9.5 -10.2 -2.0 32.0 0-255 q2817.jpg 01:00 4.000 10.7 -10.1 -1.9 35.1 0-255 q2820.jpg 01:05 4.000 11.9 -9.9 -1.9 39.2 0-255 q2823.jpg 01:10 4.000 13.0 -9.8 -1.7 44.8 0-255 q2826.jpg 01:15 4.000 14.2 -9.6 -1.6 52.2 0-255 q2829.jpg 01:20 4.000 15.3 -9.4 -1.5 62.4 0-255 q2832.jpg 01:25 2.000 16.5 -9.2 -1.4 75.8 0-200 q2836.jpg 01:30 2.000 17.6 -9.0 -1.2 91.9 0-200 q2838.jpg 01:35 2.000 18.7 -8.8 -1.0 108.8 0-255 q2840.jpg 01:40 2.500 19.9 -8.6 -0.8 123.7 0-255 q2841.jpg 01:45 2.000 21.0 -8.3 -0.6 135.4 0-255 q2842.jpg 02:05 0.800 25.5 -7.2 0.4 159.4 0-255 q2846.jpg exp: Exposure time in seconds (200 ISO, f/3.5). A: Azimuth of the Sun (degrees). hSun: Altitude of the Sun (degrees, negative below horizon). h15: Max. altitude of sunlight at 15 km height (degrees). h85: Max. altitude of sunlight at 85 km height (degrees). stretch: Contrast stretch (0-255 means no stretch).
